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Domain Controller and Exchange 2k issues

I am having issues with my current domain controller, and need to replace the hardware in order to solve the issues - i.e. the existing DC needs to be re-built!  I plan to introduce a new DC into the domain in order to remove the old one.

Current domain controllers:

w2k advanced server "PDC" - DC, DNS, DHCP, AD, GC, Master Browser, fileserver
W2K advanced server "Mailserver" - DC, Exchange

I have the following questions if anyone can help:

1. I understand that I need to install w2k advanced server on my new hardare, and then use DCPromo on the current DC to demote it.  How do I ensure that my new server becomes the new DC and takes on GC etc roles?

2. Do I set up DNS on the new DC before or after I've demoted the existing DC?

3. I have Exchange 2k running on a DC (unfortunatley I inherited this) - can I demote this machine so that it is not a DC, or do I need to move exchange?  If I need to move exchange, will introducing a new e2k machine into the domain and enabling replication to it allow me to dcpromo and remove the current exchange server?

Thanks in advance.
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Pete Long
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s9

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Thanks PeteL

How about the DNS? Unfortunatley I need to remove the existing DC to re-build it - it currently crashes about once a day and loses its static IP address on re-boot (very bizarre) - has been getting worse up to a crux point this week.  Problems began after Exchange mailbox database got corrupted in August and took the domain out - we had to restore the AD schema to the DC and its not been quite right since.

So I need to transfet the DNS - its only a small organisation and I can easily re-create what I have on the new server, but I have read that I can transfer the DNS to the new DC, which will also take on the DHCP role.

Basically I am unsure if I need to configure all of this before or after I demote and remove the old DC from teh domain.  Obviously no-one will be albe to log on to the network until all of these items are moved succesfully.
follow this ed crawly's article at
follow all the links it has everything you need to do.

http://www.swinc.com/resource/e2kfaq_appxa.htm

cheers!

ThanQ